Electric lock lamp-socket.



A. J. KEMPIEN.

ELECTRIC LOOK LAMP SOCKET. APPLICATION r1131) 001. 3, 190a. RENEWED1110.12, 1011.

1,032,362. Patented July 9, 1912.

MINE 3 AUGUST J. KEMPIEN', ST. PAUL, MINNESOTA.

, ELECTRIC LOCK LAMP-SOCKET.

uoaasce.

Specification of Letters Patent.

Patented Julyt), 1912.

Application filed October 3; 1908, Serial No. 456,020. Renewed August12, 1911. Serial No. 643,782.

To all whom it marl concern:

Be it known that 1, AUGUST J. KEMrmN, a citizen of the United States,residing at St. Paul, in the county of Ramsey and State of Minnesota,have invented a new and use-' ful Improvement in Electric Lock Lamp-Sockets, of which the following is a specification.

My invention relates to improvements in electric light sockets and hasto do more particularly with that class which is provided with means forpreventing the removal of the lamp from the socket without the use of akey.

The mechanism disclosed in this application is an improvement upon themechanism -the key being shown inserted so that the lamp can be removed;Fig. 3 is a vertical sectional View in elevation of the threaded innershell and a block on which said shell is swiveled the capsule orcovering being removed and the key shown inserted to allow the lamp tobe unscrewed from the inner shell; Fig. 4 is a plan View looking downupon thcinner shell, the pintle being shown in section taken upon theline YY of Fig. 3, and Fig. 5 is a perspective view of the key.

In the drawings A represents a lamp having the usual threaded electricalcontact thimblo B upon its neck B and C tlusocket having the capsule orouter shell E of usual construction. The capsule is provided with a headD which is secured thereto by means of a separable connection such asthe lock groove and slot 2 and Said shell is also provided with an innerlining 1 of insulating material to prevent current from passing to thecapsule from the electrical conducting parts of the socket. In thesocket and secured between the head D and a shoulder 5 which is formedon the shell is a block or support F made of porcelain or other suitableinsulating material and upon which are mounted the contact piecesultimately oonnecting with the lamp. Upon one of these,

contact pieces 6, which is secured to the block by the screws 7, is aswivel pin orpintle 8 and free to turn upon said pintle is the threadedinner shell .9 of usual form. In the upper end of the inner shell is-aninsulating disk 10 and between the swivel shell and the contact piece 6is an insulating washer 11. The lower end of pintlehas a head and theupper end is adapted'to be upset over the washer 12 to secure thepintle, insulating disk 10, threaded inner shell,

lnsulating washer 11, metal washer 12 and contact piece 6 together.

' The insulating'washer 10 is formed with a lug 13 which projectsthrough the threaded inner shell and which is adapted to impinge againsta bar 14 of a key 15 said key being adapted to be inserted through anopening 16 in the outer shell and into a cavity 17 in the block, so thatwhen it is desired to remove the lamp from the socket'it can beunscrewed by turning it in one direction and causing the lug 13 toimpinge against the bar 1-1 on the key. The key can be removed byturning it up in the cavity 17 in the block and withdrawing it throughthe slot 16 which is arranged in transverse position in the capsule. Theupper end of the threaded inner shell is formed with an upwardlyprojecting spring 18 which is adapted to sweep overthe lower surface ofthe block when the lamp is turned in a direction tending to unscrew itfrom the capsule, said spring allowlngthe capsule to turn freely and notpermitting the lamp to be removed from it.

By reversing the motion of the lamp andturning it into the socket, thespring 18 is adapted to engage thcshoulder 19 in the head and hold theca psule while the lamp is being screwed into the socket. Thus it is notnecessary to insert the key in the socket to place alamp therein and itis onl necessary to insert a key in order thattl e lamp may be removed.As shown the socket is provided with a switch or what is commonly innershell when the shaft. 22 is turned by means'oi the thumb-piece 23 1nt0vertical leading one side of the circuit down through the parts of theswitch and to the inner shell and the other side through the contactpiece 6-andpintle 8, the parts of each side of the circuit in the socketbeing obviously insulated or spaced apart.

In accordance .with the patent statutes I have described the principlesof operation of 'my invention together with apparatus which I nowconsider to represent the best embodiment thereof but I desire to haveit understood that the construction shown is onl illustrative and thatthe invention can be carried out by other means and applied to usesother than those above set forth wit-hin the scope of thefollowing-claims.

Having described my invention what I claim as new and desire to protectby Letters Patent is:

l. A device of the classset forth, com- ,prising, in combination, anouter inclosing shell, a threaded inner shell free to turn in 'saidouter shell, an insulating block 'in-said outer shell having an indent,a swivel joint between said block and inner shell, a key inserted insaid outer shell, key engaging mechanismv associated with said innershell and a spring between said block and inner shell adapted to sweepover said block and engage therewith in said indent to prevent saidinner shell from turning in onedireci 1 tion and allowing it to reverse.

2. A device of the class setforth, coin- ;prising, in combination, aninclosing outer shell, a lamp supporting member swiveled in said outershell, an insulating block in said outer shell above said lampsupporting member and having an indent in its lower said socket shellwhen a lam surface and a yielding member carried by said lamp supportingmember and adapted to sweep over said insulating block when said lampsupporting member is turned in one direction and to engage saidinsulating block in said indent when said lamp supporting member isreversed.

3. A lamp socket of the class set forth, comprising, an inclosing shell,an insulating support withinsaid shell, and a socket shell swiveled uponsaid support 'having means operable by a key to prevent the rotation ofis being unscrewed, and a ratchet automatically prev venting therotation of said socket shell in the opposite direction when said lampisbeing screwed into said socket shell.

4. A lamp socket having a swivcled lamp engaging socketshell insulatedtherefrom and adapted to turn when a lamp is moved in a disconnectingdirection, and a ratchet adapted to automatically hold the lamp engagingmember against rotation while a lamp is being secured in said engagingmember.

5. A lamp socket having a swiveled lamp engaging socket shell insulatedtherefrom and adapted to turn when a lamp is moved in a disconnectingdirection, and means adapted to automatically hold the lamp engagingmember against rotation while a lamp is being secured in said engagingmember.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

AUGUST J. KEMPIEN.

Witnesses:

H. L. FIsoHER, R. A. FIscHnR'IQ Copies c t this patent may be obtainedfor five cents each, by addressing the Commissioner of'Patents,

- washingtoml). G. I

